Mix flour, salt, and black pepper in a shallow dish.
Coat each chicken breast with the flour mixture.
Shake off any excess.
Heat olive oil in a large skillet over medium heat.
Add chicken breasts and cook until golden brown, about 4-5 minutes per side.
Remove chicken from the skillet and set aside.
In the same skillet, add sliced cremini mushrooms.
Cook for about 5 minutes until they turn golden brown.
Stir in the minced garlic and cook for another minute.
Pour Marsala wine into the skillet with mushrooms.
Bring the mixture to a simmer and allow it to reduce slightly.
Add chicken broth, stirring to combine.
Return the chicken breasts to the skillet.
Simmer for 10-12 minutes until chicken is cooked through and sauce thickens.
Sprinkle with fresh parsley before serving.